Why are neodymium magnets more in demand?

In: Applications of magnets On: Hit: 125

There are different types of permanent magnets, but the most used are neodymium magnets. They are strong magnets and widely used in all sectors.

Neodymium magnets and their manufacture

The magnetic neodymium material is designated as a rare earth metal and are the strongest permanent magnets manufactured on the market.  However, since these rare earth metals occur in nature only in the form of oxides, a separation must be carried out in an electrolytic furnace. After passing through the electrolytic furnace with subsequent cooling, we obtain a raw bar. This ingot is transformed by a subsequent process into a powder with a very small grain size (0.003 mm or less). Through a following process of pressing and sintering, the magnet receives its magnetic properties. This is followed by a surface treatment followed by a coating. Finally, the neodymium magnet is magnetized in a magnetic coil, which also determines the desired direction of its magnetic field.


Neodymium permanent magnets and their meaning

The permanent magnets made of neodymium are produced as disk magnets, bar magnets, block magnets, cube magnets, ring magnets, cone magnets or magnetic spheres, according to the desired application. For special applications, self-adhesive magnets or magnets with holes are also manufactured. The latter can be fixed with screws if a secure fixing is required.

An important area of ​​application is in the school sector, where permanent magnets are often needed for learning purposes.

Magnetic strips or magnetic boards can be used to equip bulletin boards, on which general information is transmitted.

Also the mounting and fastening magnets are permanent magnets with a variety of ways of use. In a kitchen, it is often necessary to create a short-term temporary storage facility for knives and cutting devices when preparing meals. A magnetic retention strip for knives is an ideal solution.

Furniture doors are often secured by neodymium magnets to guard against involuntary opening.

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In automotive technology, permanent magnets made of neodymium are used in small electric motors such as wiper motors and motors for window regulators.

In the manufacture of models, either in the range of aircraft models or in the construction of railway models, permanent magnets made of neodymium are in great demand due to their extremely strong magnetic properties. These special properties mean they can be very small, which predestines them for the small engines required there.

In the field of acoustics, permanent neodymium magnets find useful applications when installed in loudspeakers.

In pre-cast concrete construction technology, permanent magnets made of neodymium are used in the for formwork, where they hold the elements of the formwork with great force.

A well-summarized source of solutions to magnetic problems that require the use of permanent neodymium magnets is very useful here.


Strong neodymium magnets and their competitive advantages

Neodymium permanent magnets have the strongest magnetic properties in relation to their  volume, compared to all other permanent magnets. To get an idea of ​​the strength of the generated magnetic field, consider the relationship of its attraction to its own weight. This ratio is 1000: 1 for neodymium magnets. Therefore, they are capable of producing, even with small dimensions, very strong magnetic fields.

Another advantage of neodymium magnets is their high resistance to demagnetization. The neodymium magnets have a high flexural strength of approximately 250 N / mm2 and a high compressive strength of approximately 900 N / mm2.



In many applications, where permanent magnets are needed, it is important that strong magnetic fields are required, because the available space is very limited. Therefore, strong magnets are required, which can generate a strong magnetic field even with small dimensions. The field of magnetic engineering is increasingly important nowadays and requires constant development to always achieve the best results. We are committed to this development of magnetic technology and we constantly pursue our ambitious goals. Challenge us with your magnetic problems and contact us at any time.


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